Class EXTInstancedArrays


  • public class EXTInstancedArrays
    extends java.lang.Object
    Native bindings to the EXT_instanced_arrays extension.

    A common use case in GL for some applications is to be able to draw the same object, or groups of similar objects that share vertex data, primitive count and type, multiple times. This extension provides a means of accelerating such use cases while reducing the number of API calls, and keeping the amount of duplicate data to a minimum.

    This extension introduces an array "divisor" for generic vertex array attributes, which when non-zero specifies that the attribute is "instanced." An instanced attribute does not advance per-vertex as usual, but rather after every divisor conceptual draw calls.

    (Attributes which aren't instanced are repeated in their entirety for every conceptual draw call.)

    By specifying transform data in an instanced attribute or series of instanced attributes, vertex shaders can, in concert with the instancing draw calls, draw multiple instances of an object with one draw call.

    Requires GLES 2.0.

    • Field Detail

      • GL_VERTEX_ATTRIB_ARRAY_DIVISOR_EXT

        public static final int GL_VERTEX_ATTRIB_ARRAY_DIVISOR_EXT
        Accepted by the pname parameters of GetVertexAttribfv and GetVertexAttribiv.
        See Also:
        Constant Field Values
    • Method Detail

      • glDrawArraysInstancedEXT

        public static void glDrawArraysInstancedEXT​(int mode,
                                                    int start,
                                                    int count,
                                                    int primcount)
      • nglDrawElementsInstancedEXT

        public static void nglDrawElementsInstancedEXT​(int mode,
                                                       int count,
                                                       int type,
                                                       long indices,
                                                       int primcount)
      • glDrawElementsInstancedEXT

        public static void glDrawElementsInstancedEXT​(int mode,
                                                      int count,
                                                      int type,
                                                      long indices,
                                                      int primcount)
      • glDrawElementsInstancedEXT

        public static void glDrawElementsInstancedEXT​(int mode,
                                                      int type,
                                                      java.nio.ByteBuffer indices,
                                                      int primcount)
      • glDrawElementsInstancedEXT

        public static void glDrawElementsInstancedEXT​(int mode,
                                                      java.nio.ByteBuffer indices,
                                                      int primcount)
      • glDrawElementsInstancedEXT

        public static void glDrawElementsInstancedEXT​(int mode,
                                                      java.nio.ShortBuffer indices,
                                                      int primcount)
      • glDrawElementsInstancedEXT

        public static void glDrawElementsInstancedEXT​(int mode,
                                                      java.nio.IntBuffer indices,
                                                      int primcount)
      • glVertexAttribDivisorEXT

        public static void glVertexAttribDivisorEXT​(int index,
                                                    int divisor)